Phosphorus, Serum

Test ID: 

703078

CPT code:

84100

Synonyms:

•Inorganic Phosphate, Blood

Clinical Use:

Causes of high phosphorus: Youth; exercise; dehydration and hypovolemia; high phosphorus content enema; acromegaly; hypoparathyroidism; pseudohypoparathyroidism; bone metastases; hypervitaminosis D; sarcoidosis; milk-alkali syndrome; liver disease, such as portal cirrhosis; catastrophic events such as cardiac resuscitation, pulmonary embolism, renal failure; diabetes mellitus with ketosis; serum artifact−sample not refrigerated; overheated, hemolyzed sample, or serum allowed to remain too long on the clot. Causes of low phosphorus: (Hypophosphatemia may occur with or without phosphate depletion. Serum levels vary as much as 2.0 mg/dL during the day.)

Specimen Type:

Serum (preferred) or plasma.

Requested Volume: 

1 mL

Minimum Volume: 

0.5 mL

Container Type: 

Red-top tube, gel-barrier tube, green-top (heparin) tube, or lavender-top (EDTA) tube.

Patient Preparation: 

Patient should be fasting.

Collection:

Separate serum or plasma from cells within 45 minutes of collection.

Storage Instructions:

Maintain specimen at room temperature.

Expected Turnaround Time:

1 to 2 Days

Rejection Criteria:

Hemolysis; gross lipemia; improper labeling.